Propeller



Feb. 4, 1930. F. J. CONWAY 1,746,145

PROPELLER I Filed Jun 15, 1928 2 Sheets-Sheet l Inventor a]: (fairway,

- Attamqy yflmm Feb; 4,1930. N v I 1,746,145

HPROPELLECR Filed June =l5. 1928 2 Sheets-Sheet 2v Z. c7, Conway,

, Attomqy Inventor 40 7 when the propeller is being operated.

Patented Feb. 4, 1930 I TENT" OFFICE UNITED S AT S FRANCIS J'. CONWAY, OF POTTSVILLE, PENNSYLVANIA PROPELLER Application filed .Tune 15,

The present invention relates to a propeller and the objects and advantages thereof will appear as the description proceeds.

ure 1,

i5 plurality of blades 6 radiating outwardly v In the drawing:

Figure l is a front elevation of a propeller embodying the features of my invention,

Figure2 is a sectional view therethrough taken substantially onthe line 22 of Fig- Figure 3 is a rear elevation thereof, and Figure 4 is a detail section substantiall on the line 4'-4 ofFigure 1. I

Referring to the drawing in detail it will be 7 seen that the numeral 5"denotes a hub with a therefrom and curved longitudinally only.

' all transverse dimensions are parallel to the verse to the direction of rotation of the pro:

that is the end from which the air is coming.

The blades are straight transversely so that axis of the hub. The longitudinal curvatures of'the blades are all in the same direction repeller indicated by the arrow 7.

On the ends of the blades 6 there is an 7 annular, shroud 8. This shroud is curved transversely as is shown in Figure 2 so as to taper toward the front end of the propeller The shroud is wider than the blades and terminates rearwardly of the rear edges of the blades.

In this propeller I depend upon the combined action of the set of blades and the inclined and curved shroud. .I depend upon this set of blades building up a pressure on the concaved inner surface of the shroud big enough for the desired lateral thrust.

' the propeller,

This combination of'shroud and blades is essential to the working of the device. There are three distinct actions of the air First, the air enters the. front center of through the opening in the shroud. I

. Second it comes into contact with the blades and changes its course from a direction parallel to the axis of the propeller to a direction I at right angles to the said axis.

Third the air has both its velocity and pressure increased by theaction of the blades 1928. Serial No. 285,661.

as it comes into contact with the inclined and curved shroud.

The third action produces the desired lateral thrust by exerting a pressure against the.

concaved side of the inclined and curved shroud. a

It is thought that the construction,utility and advantages of this invention will now be quite apparent to those skilled inv this art 7 without a more detailed description thereof. The present embodiment, of the invention practice it attains the features of advantage enumerated as desirable in the statement of the invention'and the above description.

has been disclosed in detail merely for the. .7 purposes of exemplification since in actual It will be apparent that changes in the de v.

and arrangement of parts maybe resorted to without departing form the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages.

a shroud of annular formation connecting the ends of these blades, said shroud being tapered toward oneforward end of the propeller, and being curved transversely.

In testimony whereof I aflix my signature.

FRANCIS J. CONWAY.

tails of construction, and in the combination 7 

